Brake mechanism



i July.2, 1935. 'v. G. APPLE BRAKE MECHANISM 2 Sheets-Sheet [l Filed Nov. 2, 1929 Mncem M/VENTOR.L

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A TTORNEYL.)7

V. G. APPLE BRAKE MECHANISM July 2, 1935.

Fiied Nov. 2, 1929 2 Sheets-Sheet 2 INVENTOR.

A TTORNEY` 'Patented July'z, 1935 l y 2,005,334

, UNITED STATES Aiefrfrsrrr 'oFFlCB-- y "2,006,334 BRAKE MECHANISM vVincent G. Apple, Dayton, Ohio, assignor to l Bendix Brake Company, South Bend, Ind., a corporation of Illinois Appunti@ November 2, 1929, serial No. 404,243 4 claims. (ci. 18s- 2) My invention relates to improvements invbrakes against relative axial movementby the nut` 46 and has particular reference to those adapted for threaded into the housingr at 48. Washers 5I)` and use on automotive vehicles. 52 held between the nut 46 and the race 42 are An object is to adapt a ,completely enclosed arranged with space between them for the pack- 5 dirt and waterproof brake assembly such as that ing ring 55, which prevents escape of the lubri- 5 disclosed in my copending application Serial No. cant within the housing 44 to the outside of the 404,241, filed November 2, 1929 for use with a structure. Another packing ring 58, retained full iloating axle. in the yhousing M by the nut 60, keeps thel lubri- Generaliy, the object of my invention is to cant Within the housing,r and out of the compartso connect'the electric motor power means with ment 3S which contains the friction members. l0 the retarding means that it will be unnecessary to The brake drum 62 is secured to a. flange 64 exmaintain a now of current through the motor in tending outwardly from the housing 24 by means order to retain the brakes in their applied position of the rivets 66, and the brake drum cover 68 is and to provide suche. connection between the mosimilarly secured to the flange 1I! of housing M.

a tor and the retarding means that the reversal The drum cover is secured to the drum by means of the motor will function to permit the release of the bolts l2, forming the watertight compartof the brakes, and to adapt this entire eonstrucment 35 in which the friction members are 1otion to a full floating axle structure. cated.

In the drawings: The non-rotatable friction means is composed Fig. l is atransverse section taken on line l--l of the customary brake shoes 'i4 and 1B, which 20 of Fig. 2, and differ from the ordinary shoes, however, in that Fig.` 2 is a vertical axial section taken on the they are channel shaped in cross section, as clear- ]ine 2 2 of Fig, 1, iy seen in Fig. 2 of the drawings. This is necessi- The axle structure oi the vehicle wheel includes tated by the fact that both sides of the brake 1 the tubular spindle I swaged at 2 and having the drum revolve in this assembly and for that reason 25 re'-inforcing member 3 riveted toit at 4. A sleeve the brake operating mechanism cannot be or axle member S ts snugly over the spindle I mounted, as is customary, on a backing plate. In Y and is held against rotation thereon by a series lieu of the backing' plate I have provided the axle vof external teeth 8 at the end of the sleeve which member 6 with radially extending arms which fit into the internal teeth Il) o! member '3. carry the camxning mechanism, broadly indicated 30 An anti-friction bearing I2 has an inner race at 16 in the drawings, for expanding the brake I4 of a diameter to lit snugly over the spindle I shoes against the tension of the spring 80, and and a nut IG threaded at IB onto the end of the the reversible electric motor 82 which operates spindle forces this inner race against the end of the camming means through the brake arm 84, the sleeve 6,which inturn is forced against shoulalso secured to one of the aforesaid radially ex- 35 der 20 of the re-inforcing member 3, whereby tending arms by the pivotal connection 86. race I4 and sleeve 6 are secured against axial The armature shaft of this Velectric motor is movement. provided with a threaded extension 88 on which The outer race 22 of the bearing l2 supports there is a correspondingly threaded weighted 4o the bearing housing 24, a nut 26 threaded into the runner 9B. The fact that the runner is weighted 40 housing '24 securing the housing against axial normally prevents it from rotating when shaft movement on the race 22. Packing ring 30 is sen 88 is rotated. The brake arm B4 isv bifurcated at cured to the housing 24 by the nut 34 and keeps one extremity, as at 92, so that it straddles the the lubricant within the bearing housing and out extension of the armature shaft and its face adof the compartment 36 which contains the fricjacent the runner 90 is somewhat rounded to 45 tion members. minimize the friction between the two as the Another anti-friction bearing 38 of relatively axial movement of the runner swings the brake large diameter for its capacity has its inner race arm in an are about its pivot 86 to operate the 40 tted snugly to the outside oi? the sleeve cr camming mechanism 16 and thus apply the axle member 6, but is not restricted in axial movebrakes. 50 ment thereon. This allows the inner end of the The brakes are shown in their on" position, drum to be free to accommodate itself to any exbut when the motor is reversed the runner will pension or contraction or other movement oi the slide axially to the right on the amature shaft drum. The outer race 42 supports the bearing extension and permit the release of the brakes Y '55 housing M, the two members being secured by means of the customary springs, including 80, 55

acting through the cam mechanism 16. It is obvious that the threaded connection between the armature shaft extension and the runner willretain the brake arm in whatever position it may be when the electric current is cui. off and the shaft ceases to rotate. Thus the brakes will be retained inany intermediate position without the expenditure o! any electrical energy. v While oneillustrative embodiment of my invention has been described, it is not my intention to limit its scope to that particular embodiment, or otherwise than by the terms of the appended claims.

I claim: 1. Brake mechanism comprising, in combina tion, an axle structure.- a hollow closed brake drum provided with a bearing housing at each end, a bearing within each housing, means co` operating with the bearing housing at'one end oi' the drum positioning the drum upon the axle structure, said other bearing housing being free;

to shift axially with respect to the axle structure to accommodate for expansion or contraction of the drum.

2. Brake mechanism comprising, in combination, an axle structure, an integral brake drum closed at each end and iournalled for rotation about said axle structure, means cooperating with one end of the drum positioningthe same axially with respect to the axle structure, saidother end ofthe drum being free to float axially with re- `spect to the axle structure.

3. Brake mechanism comprising, in combination, an axle structure, an integral brake drum closed at each end and journalled about said axle structure, means cooperating with one end o f the drum positioning the same axially with respect.

to the axle structure, said other end of the drum being free to iloat axially with respect to the axle structure, means sealing each end of the drum against. entrance of foul material about the axle structure into the drum.

4.`Brake mechanism comprising, in combination, an axle structure,.an integral 'brake drum VINCENT G. APPLE. 

